Brake-operating device for velocipedes



Dec. 26, 1922. I 1,440,017.

' l. KOECHLINL BRAKE OPERATING DEVICE FOR VELOCIPEDES.

FILED NOV-12, 1920- 3 SHEETS-SHEET l- Airy.

Dec. '26, 1922. 1,440,017

KOECHLIN. E.

BRAKE OPERATING DEVICE FOR VELOCIPEDES.

FILED NOV-12, 1920. "'3 SHEETS-SHEET 2.

Dec. 26, 1922. 1,440,017 I. KOECHLIN- BRAKE OPERATING DEVICE FOR VELOCIPEDES.

FILED N 0'V- IL 1920- 3 SHEETS-SHEET 3.

- Fig.3

B x A M Dec. 26, 1922.,

same

Isaac nonorrnrn, orLnvnLLors-rnannr, Faeries, Assrsnoa To soorn'rn Antonyms nns nn'ronronrnns a orotns Pnnenor, orrnvntrlors-rnnnrr, snrnn, FRANCE.

nnnnn-ornna'rrne names not vntocrrnnnsi Application filed. November 12, 1920. Serial at. 423,586.

To all whom it may condom:

Be it known that 1, Isaac KOECHLIN, citizen of the French Republic, residing at Levallois-Perret", Seine, in the Republic oi hrance, have invented new and useful 1111- provei'nents i'n Brake-Operating Devices for Velocipedes, of which thefollowing is a specification. i

This invention relates to a brake operating device which is applicable to a brake for bicycles or like apparatus, the braking action being obtained by reversing the direction of rotation of the cranks; that is, by back pedaling. i p y l According to this .lHYGDi lOIL the shaft carrying the pedals is provided with a screwthreaded portion screwing into a nut which is provided with a coupling surface adapted to engage the sprocket wheel and anothercoupling surface adapted to engage a ring or sleeve connected with the brakes, the said ring having a limited movement of rotation and being alsoprevented from moving in the axial direction a spring is provided for braking the movement of rotation 01: the said nut. l v

Among other advantages the improved construction allows the machine to be moved backward by hand. 1 v

The accompanying drawings show by way of example an embodiment of this invention. i

Fig. 1 is a vertical section of a device for brake operation by back pedaling, constructed according to this invention.

Fig, 2 is a corresponding horizontal sec tion, partly in plan view. v i i Fig. 3 is a similar horizontal section showing a modified formof a braking device according to this invention.

As shown in the drawing, the pedal cranks B are secured to theshaft C which is provided with a screwthreaded portion C In the present example, this screwthread isright-handed, but in other cases it might be made left-handed. D indicates a ring or sleeve having a conical internal bearing surface and contacting a shoulder K of said shaft C. A nutE screwed upon the screwthreaded portion C is provided with two conical coupling surfaces one of which can engage into a conical bore in the hub M of the sprocket wheel which rotates freely on the axle C While the other coupling surface on the nut Ecan engage spring will always be braking movement.

the arrow, the shaft C will rotate and the into a corresponding recess of the said ring teaser? F indicates a'resilient frictional member secured in a bearing sleeve N by means it 01 a projection Oand acting by friction upon the sa dnut E, [A screw'H screwed head of the screw movesin a transverse slot at Z) in the casing 1 whereby the ring or sleeve D has a limited angular movement within said casing. It indicates a shock ah-' sorbing spring for obviating all abrupt movements during the braking actionvand for transmitting the eiiort of the arm' or screw H to thebrake rodS actuating the brake shoes A. In case of defective adjust ment resulting from the excessive wear of w the brake shoes, the member P will contact the pedal casing I before the spring R is entirely compressed, and therefore the said interposed during the Theoperation is as follows? When inlnormal running, in the sense of nut E which is braked by theresilient member F and acted upon by the screwthreaded portion C of the shaft Cris caused to bear by the conical portionthereoi upon the hub M of the sprocket'wheel, thus actuating the latter. By stoppingithe movement of the pedals, the nut E willnow become blocked in'case the machine has loose rear wheel, or in the -contrary case it will become disengaged from the hub M and the sprocket wheel will rotate after the manner of a loose wheel. j y

Upon reversing the movement of the pedals, the nut E will engage the ring CD at the conicallportion'thereofand will draw it by a rearward motion, thereby actuating the brake. v

Byagain operating the pedals in the r'orward direction, the ring D is actuateduntil the arm Hcontacts the pedal casing at a, and at this moment, upon the continuation of the move'ment,the nut E is disengaged from the ring D and engagesthe hub M,

again actuating the same. A spring T disposed w thin the pedal casing I serves to 60 into the ring D has its head engaged into aid in effecting the return movement of the brake and holds the latter in the inoperative position. I v

Fromthe preceding considerations it will readily be understood that the bicycle can be wheeled hand in the rearward direction. Two cases may occur in this connection: i

a. The various members aresupposed to be in the relativepositions represented on the ,drawing; as shown, the nutE is loosened fromthe sprocket wheel M so that'the pedal shaft- C will not be actuated by the chain; on the other hand the return spring .1 holds thcbra lre in its inoperative position, thus permitting the back motion of the bicycle. j Y

b. On the contrary the nut E is. supposed to be in engagement with the hub M; by the medium of the nut E andthe screwthreaded portion C of the pedal sha'tt C, the latter will be actuatedby the backward rotation) of the sprocket wheeh "The backward rotation of thepedal shaft C willhave no action upon the braking members as the nut F has been supposed" loosened from the ring D, i. e., not in the suitable position for con- .fnecting the shaft C with the said braking members v p With. reference to Fig. 3 it will be seen that it is possible to substitute suitable toothed crowns to: the conical portions of I the various members of the described de-' vice. Asshown the nut M of the sprocket Wheel is provided with teeth m and the ring D with teeth d; at the same time the mov able nut ll is provided with two series of teeth 0 ande -adapted to respectively engage the corresponding teeth m or d. The working of the device is similar to that above described.

Havin now described in invention what Iclaim as new anddesire to secure by Letters Patentis l. A back pedaling bralre for velocipedes comprisingin combination an axle adapted to be rotated in either forward or reverse direction, a driven member rotatably mounted on said axle and having a coupling surface,. a helical projection on said axle,

I .anut member-in engagement with said helical projection and havingitwo coupling surfaces one of which is adapted to engage with the coupling surface on the driven member, aisleeve having a coupl ng surface adapted to engage with the other coupling ea-o i? surface on the nut member, means for rotatably supporting the said sleeve so that it may have a limited angular movement, means for preventing any axial displace nient'of said sleeve, yielding means adanted to brake the movement of rotation or the nut member, braking members and means for operatively connecting the said sleeve to the said braking members.

2. A back pedaling brake "for velocipedes comprising in combination anaxle adapted to be rotated in either forward or reverse direction, a driven member mounted on said axle andhavinsa'v a coupling surface,a helical projection on said axle, a nut member in engagement with said helical projection and having two coupling surfaces one of which is adapted'to engage with the coupling surface on the driven member, a sleeve having a coupling surface adapted to engage with the other coupling surface on the nut member, means for rotatably supporting the said sleeve so that it may have a limited angular movement, means. for preventing any axial displacement of said sleeve, a coil spring adapted to rotate said sleeve in one direction, yielding bers and means for operatively connecting the said sleeve to the said braking members. 3. Ar back pedaling brake for velocipedes comprising in combination an axle adapted to be rotated in either forward or reverse direction, a driven member rotatably mounted on said axle and having a toothed crowm'a helical projection on said axle, a nut member in engagement with said helical projection and having two opposite toothed crowns one of'whichis adapted toengage with the toothed crown on the driven memher, a sleeve having a toothed crown adapted to engage with the other toothed crown on tne nut member, 'means forrotatably supporting the said sleeve so that it may have a limited angular movement, means for preventing any axial" displacement of said sleeve, yielding meansadapted to b 'ake the movement of rotation of the nut member, braking members and means for operatively connecting the said sleeve to the said braking members. i i 1 In testimony whereof have signed my name to this specification.

(ISAAC KOEGHLiN.

rotatably 

